The phrase "a central subject of" is correct and usable in written English.
It can be used when discussing the main topic or focus of a discussion, study, or piece of writing.
Example: "The impact of climate change is a central subject of the conference this year."
Alternatives: "a key topic of" or "a main focus of".
Amid the global uncertainties of our times, failure has become a central subject of investigation in recent art.
That position sets up a potential conflict with Congress, where panel supporters say that intelligence should be a central subject of the inquiry.
He is over 70, and age makes a difference - and the difference that it makes is a central subject of the novel.
He is over seventy, and age makes a difference — and the difference that it makes is a central subject of the novel.
After all, Andrew S. Fastow, the former chief financial officer and a central subject of the continuing investigations, refused to speak with the special committee and invoked the Fifth before the S.E.C. and Congress.
Since then, the Vineyard — its close-knit year-round community, the legacy of "Jaws," and the island's relationship to the many tourists who descend upon it each year — has become a central subject of her work.
The human dental pulp is a central subject, in terms of the quantitative information related to the odontoblasts [ 8, 9], to the immune cells present in deciduous and permanent tooth, in normal status and disease [ 9– 11], and to the nervous elements [ 12].
Its rapturously beautiful images, which have an extraordinary, painterly sensitivity to light — as is apt for a movie on the central subject of Western art — and the awesome range and fearsome intensity of the emotional world that he conjures do indeed do their subject justice.
"The central subject of a lot of movies is the marriage plot," explained Thorpe.
Women's friendships (I've seen both Gems's much revived play and Bullmore's sparky new one with the same female friend) have more often appeared as a side issue, an emotional colouring, than as the central subject of plays.
The central subject of "Infinite Football," a drolly funny and explosively brainy new documentary from the great Romanian director Corneliu Porumboiu ("Police, Adjective"), is Laurentiu Ginghină, a middle-aged soccer enthusiast whose dreams of playing ended with a severe leg fracture on the pitch in 1986.
